ML20079J435
| ML20079J435 | |
| Person / Time | |
|---|---|
| Site: | 05000124 |
| Issue date: | 09/24/1982 |
| From: | VIRGINIA POLYTECHNIC INSTITUTE & STATE UNIV., BLACKSB |
| To: | |
| Shared Package | |
| ML20079J414 | List: |
| References | |
| NUDOCS 8212280217 | |
| Download: ML20079J435 (4) | |
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SAFETY SYSTEM Fi?NCTIONS
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'L Current Technical Specifications without Changes l
t No.
Condition Detector _
Set Point Action.
Bypass Provistops i
Item 1
Neutron Count Rate Pission Chamber in e 3 cps Dump valve cannot May be bypassed by
\\f be closed. If dump senior operator c Set Point Start-up Channel valve already closed, provided the Servo rod drive motors are Channel is fully inoperable until operative in the condition corrected.
same range (;.1 watt) 70*F Same as (1)
May be bypassed for 2
Coolant-Moderator Sensor in Process 2
a specific experi-Temperature, Set Pit ment with approval i
Point of Rad. Safety Committee 3
Coolant-Moderator Flow Orifice in g 3 gpm Same as (1);
Sams as (2) -
Annunciation Flow <, Set Point Process Pit Same as (1)
'4one l
4 Reactor Room Ventila-Relay tion Fan Off S
Moderator-Coolant Pressure Sensor in Not less than All control rod May be bypassed by Operating Level ( Set Process Pit overflow pipe drives inoperable senior operator for control rod level in core Point tests with moderate f
teoks coolant dusped ask u - a.
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TABLE I
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Itent No.
Condition Detector Set Point Action Bypass Provisions
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1 Neutron Count Rate Pission Chamber in e 3 cps Dump valva cannot May be bypassed by V) ]
c Set Point Start-up channel be closed. If dump senior operator i
valve already closed, provided the Servo rod drive actors are Channel is fully inoperable until operative in the condition corrected.
same r3nge (;.1 watt) 2 Coolant-Moderator Sensor in Process a 70*F Same as (1)
May be bypassed for Tem:perature ; Set Pit a specific experi-ment with approval Point of Rad. Safety Committee Flow detector, 1%
3 Coolant-Moderator accuracy minimum
, 3 gpm.
Same as (1);
Same as (2) ver the full scale Annunciation Flov <, Set Point range measured Same as (1) lone 4
Reactor Roon Ventila-Relay tion Fan Off 5
Moderator-coolant Pressure Sensor in Not less than All control rod May be bypassed by Operating Lovel(Set Process Pit overflow pipe drives inoperable senior operator Point level in core for control rod tanka tests with moderate coolant dumped I
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4 Proposed Technical Specifications Prior to resired Change j
d TABLE I INSTRUMENT ARRAYS A.
Measuring Channel No. Operable
. Detector Function / Action Bypass Provisions Power Level (poser range)
A minimum of 2 UCIC None Power Level (int. range) channels operating CIC None Power Level (startup range) on scale above the Fission chamber None CIC None Power Level up ammeter startup range Ultrasonic or flow None Coolant Flow 1
orifice, D/P detector Coolant Inlet Temp.
1 RTD None Coolant Outlet Temp.
1 RTD None Rod Position 1/ rod Potentiometer None
/
B.
Safety Channel 5'
Power Level (power range) 2 UCIC Scram @ 5 125%
None Power Level (int. range) 1 CIC Scram @ > 5 sec. period None Alarm @ > 10 sec. period None Moderator Level in core 1
Float switch Scram @ 5 1" from top None tanks of core tanks Manual Button 4
Contact in None switch Neutron Count Rate 1
Fission chamber Inhibit control rods &
Interlock on dump closing of dump valve valve closing may
@ 5 2 CPS.
If dump valve
'oe bypassed by a closed, inhibit control Senior Reactor rods Operator Reactor Room Ventilation Fan 1
Relay Same as neutron count rate None Coolant Flow 1
Ultrasonic or Same as neutron count May be bypassed for flow orifice, rate, if flow 1 15 GPM a specific experiment D/P DETECTOR alarm with approval of Reactor Safety Com-mittee Coolant inlet temp.
1 RTD Same as neutron count rate Same as above if temp. 5 70*F Dump Valve 1
Limit switch Inhibit control rods if None not fully closed
TABLE I INSTRUMENT ARRAYS A.
Measuring Channel No. Operable
. Detector Function / Action Bypass Provisions I
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Power Level (power range)
A minimum of 2 UCIC None Power Level (int. range) channels operating CIC None Power Level (startup range) on scale above the Fission chamber None Power Level pp ammeter startup ranste CIC None Flow detector, 1%
None Coolant Flow 1
accuracy minimum, over the full
""' d" #1 Coolant Inlet Temp.
1 kiE None Coolant Outlet Temp.
1 RTD None Rod Position 1/ rod Potentiometer None B.
Safety Channel ln' Power Level (power range) 2 UCIC Scram @ 5 125%
None Power Level (int. range) 1 CIC Scram @ > 5 sec. period None Alarm @ > 10 sec. period None i
Moderator Level in core 1
Float switch Scram @31"fromtop None tanks of core tanks Manual Button 4
Contact in None switch j
Neutron Count Rate 1
Fission chamber Inhibit control rods &
Interlock on dump
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closing of dump valve valve closing may
@ 1 2 CPS.
If dump valve be bypassed by a closed, inhibit control Senior Reactor rods Operator Reactor Room Ventilation Fan 1
Relay Same as neutron count rate gone Coolant Flow 1
Flow detector,1% Same as neutron count May be bypassed for accuracy minimum, rate, if flow 1 15 GPM a specific experiment over the full alarm with approval of scale range Reacto'r Safety Com-measured mittee Coolant inlet temp.
1 RTD Same as neutron count rate Same as above if temp. I 70*F Dump Valve 1
Limit switch Inhibit control rods if None not fully closed O
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